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Other Comprehensive Income - Schedule of Change in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 530,762 | $ 442,847 | $ 416,137
Comprehensive Income (Loss) | 6,442 | (52,126) | (15,468)
Ending balance | 571,247 | 530,762 | 442,847
AOCI Attributable to Parent |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (52,520) | (394) | 15,074
Comprehensive Income (Loss) | 6,442 | (52,126) | (15,468)
Ending balance | (46,078) | (52,520) | (394)
Unrealized gains (losses) on securities available-for-sale |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (54,282) | (706) | 15,338
Comprehensive Income (Loss) | 6,109 | (53,576) | (16,044)
Ending balance | (48,173) | (54,282) | (706)
Amortization of unrealized gains from held-to-maturity securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 875 | 0 |
Comprehensive Income (Loss) | 591 | 875 |
Ending balance | 1,466 | 875 | 0
Unrealized gains (losses) on postretirement benefits plan |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 768 | 618 | 343
Comprehensive Income (Loss) | (139) | 150 | 275
Ending balance | 629 | 768 | 618
Unrealized gains (losses) on interest rate swap |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 119 | (306) | (607)
Comprehensive Income (Loss) | (119) | 425 | 301
Ending balance | $ 0 | $ 119 | $ (306)

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